UMass will enter the 2013 season with just two offensive lineman — Anthony Dima and Vincent Westcarr, who were even in the program in July 2012. But they’ve attempted to restock. Rutgers transfer David Osei and junior college transfer Josh Bruns join a group that includes seven true freshman — Sam Zeff, Jordan Page, Cameron Mock, Fabian Höller, Terrel Correia, Tyshon Henderson, Rich Queen — a redshirt freshman, Tyrell Smith, and two sophomores, Al Leneus and Matt Sparks.